<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="css/demo03.css">
    <title>普通导航</title>
</head>
<body>

<span class="1">导航1</span>
<span class="2">导航2</span>
<span class="3">导航3</span>
<span class="4">导航4</span>
<span class="5">导航5</span>

</body>
</html>